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On the ground state of mixed-valence semiconductors
| Content Provider | Scilit |
|---|---|
| Author | Kikoin, K. A. |
| Copyright Year | 1984 |
| Description | Journal: Journal of Physics C: Solid State Physics A new variational procedure is proposed for calculating the ground-state energy of mixed-valence (MV) semiconductors such as SmS and $SmB_{6}$. This procedure uses the localised basis involving one- and two-electron states of a dielectric Anderson lattice with electron-hole attraction. The mixed-valence state can be obtained only beyond the Hartree-Fock approximation. The non-orthogonality catastrophe arising due to the overlap of the exciton wavefunctions is solved by means of a modified Lowdin-Carr method. Some physical consequences of the model accepted are discussed; it is shown in particular that the model resolves the controversy between the semiconducting behaviour of the static dielectric permittivity and its metallic high-frequency properties responsible for the golden colour of SmS in the high-pressure phase. |
| Related Links | http://iopscience.iop.org/article/10.1088/0022-3719/17/36/021/pdf |
| Ending Page | 6684 |
| Page Count | 14 |
| Starting Page | 6671 |
| ISSN | 00223719 |
| DOI | 10.1088/0022-3719/17/36/021 |
| Journal | Journal of Physics C: Solid State Physics |
| Issue Number | 36 |
| Volume Number | 17 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1984-12-30 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics C: Solid State Physics Condensed Matter Physics Hartree Fock Approximation Ground State High Pressure Ground State Energy High Frequency |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy Condensed Matter Physics Engineering |
